import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * @author CoderXshuai
 * @date 2021/8/3 21:52
 */
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        reader.close();
    }
}



